Prokaryotes will take up foreign DNA ... how is this characteristic used in genetic engineering

This characteristic is used for inserting the recombinant vector into the bacteria during the process of DNA cloning. DNA cloning is a molecular biology technique (genetic engineering) that makes many identical copies of a piece of DNA, for example, gene. That target DNA sequence (gene) is inserted into a circular piece of DNA called a plasmid and introduced into bacteria via process called transformation.